Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d96eca65aa2f2164f0a48dad45a168bfdb89d179c609572d6579e5fde5db90f' 
  AND token = 'rz6QaSD06r3eEoEMmVURsEvDnAzPWc7mVzg0xPbl2Z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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