Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c8da22d13522103ba8636c36e063ddfa049baa57abac93702b6e43a2b601b96' 
  AND token = '8XwjsfNI2APzuzmxIvrWhpZk+r6Sqk/YQ8l02o6UD1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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