Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd23058e9b1c443630622ef198a9435969525ee580933bcf42b015800d9783a48' 
  AND token = '9BB6bhklFX56oP8uIuqYfeY4x1+fSaI0w1bJko4y8Qg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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