Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4c806f4d763c2e782f5d140da616fbd558fcc94a68a0b049bdbb1d3a520fb1b' 
  AND token = 'Z6Zsd4FIzt1bLqQWf6xXxt6CfDnd1aPpGWpEw9lwVCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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