Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4be319c608827a06b65133fee764ef7015ab92006ea807511809ab2051b8d0e' 
  AND token = '23uIpt5dSmQyyFNmQvZJz7HLAOf9cqVcn4WDxLarlVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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