Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c84d528dd11de92501ee3fc3ad4633d988e55d2f48998b0e3fe91ef4f109e85b' 
  AND token = 'rttVbH3Jy921NUH5G4nrEF+hnnNwnHrCjpz+2oQUkm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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