Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f8f3a75fe192ccd441511053711235190d30070591ff327d5d79eed99d4a24' 
  AND token = 'QWJBa6W2vwt6Tzj6uo7rv67dWtTqOiPkwMeqF2MERjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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