Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2987cd77099e7c1d046a539c89af65f90c5331722638276756435ca88e1ce6f4' 
  AND token = 'cfYNXFFdXqEk1ePjsn8OIOMjieGcOfSOdB1g8gICdGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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