Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'facdbfcaa9938dba16e3f5122530f90b79dceaf59bd85a5ef34074c8ad5b18c8' 
  AND token = 'D7ZwlhCM7iYxUAWLiWA4MBTA2QINnNRdQQLJ2So0LO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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