Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cd3f653fc1e96729bca13ab197b934145122072ecc68a4e51f018fb8224efea' 
  AND token = 'nrGtTDZ8OvXnGJjBedW011w/7+VviFfuh0r2lWnOB4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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