Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09f81db85a2d1571216dd3c744dc68d88339caa0852668f653650b15f5c2597e' 
  AND token = 'TplNksKKiYGLwofU0kUUjMxYmOm72Pj63rWSfR21Bgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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