Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40e38849c1838260623aa145a1796d6fefb531b21a51dfbc9f8d699cd0366179' 
  AND token = 'KIPiAQx6oINUNHCerkf0CBWK9nndG1+BeN9G4bbKqr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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