Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7275ba8b65d22bbc4071146ec88c6d8ff131a72d00a4f2f5ebc7248d74377d66' 
  AND token = 'MZnsG0kpqfCuYWLAp18qUI9+iQUawa8GA+hwASqUc1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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