Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9372a3a68b9587bee9a3c33a4fcc43fe94745efc7c3f9adc1a0074534ada5d0' 
  AND token = 'baJoWVYj7wDtn2HYBsRt0OgA5eGn5+n69TknYPI94AA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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