Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d4be79df9fd5005d7f522e07ef607b35be3409723e6d86743158e30c750d289' 
  AND token = '2PkwzKhwCAOnHiedDDpYq9NScZRTaJDVl0/p0XQwOaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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