Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '164b247f2736c7567a44f9a3a7719e74c3536841f22fd4d50a69235aaa759b91' 
  AND token = 'Dv74fktNOYVljgeI00vzFRtM6bDSKt8vFciZq+QESYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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