Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d915b89e6c4431eff3c591280d6d807945d8c0525e191ec1d7800a14aeead13' 
  AND token = 'ATcFSeOUVE0loTswgGHWtvmSKuHNscTMX0jZvx7rGxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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