Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0a0e887b11288b2b2fff54b6a5f4727d83e34c944b8b30c500f93c8c651a806' 
  AND token = 'nbzzbgp1UVCWeQeYtUsz7YA1jt2VJap6QDR3nXl0ncM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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