Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab07b360abebb14d402da59d7a43565e1589909a2219abe12ce6818b1755656' 
  AND token = 'n1vAWvGZNZuBQD+Uon58BqRADji2mQHXDLxYAnhzaOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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