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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f60049e328c2fb5818e7b8c53e264826abd2d110ce5088781288a4a8e0beb7d' 
  AND token = 'K4B+W+wYIuQZ2Ic8qF+FFAh7QWH1IHg3j47XmLUmxtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}