SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0572b0a17f6069c9ec75e5ff13d307b47b3a5c179556680758414dbf4275ff28' 
  AND token = 'WjLPuQePGpZ8zj0o72yanmNYwxyU/Q6lVDqUMI8RusY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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