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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3244f32ffb73137b2aaf3a49e01c9b43c1b2a5ce8fc92bd46cc8f61417630ae8' 
  AND token = '5dTcx6Wp4cYQzRw4SD/QMna3V4NHlWri3tShq0TTbCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}