Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15b786ac33d5862e561d25714c2705ecb59cb65b2bb25adf0565e929218f3bb7' 
  AND token = 'vspEVHwbroa2zesLVxrEufq5QSXZlM9tpIaaKJBXb/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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