Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88784ae8cdac1c516233cb67ce2ae253f68a5fb7d291b9079d8e2db4824bc8b4' 
  AND token = 'lR7h1y0E62lX/Lb+cXqAaNskxNExHO0EeT8+9YCOnCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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