Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b6c329f1e8910c361fedf554c9f2427eb8d1183bd3c7b51f6180bcd8d0059b4' 
  AND token = 'BeB+JjrdGNH8xYeZ0EhUUd1s433y9nSiM/IhOcrzocc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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