Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36be66c749dc75206bd6be809a58b1a94edd48b5b6a61096267dcec446b95510' 
  AND token = 'pyJHwfWc6SAkAR0cVON3252slcpbRnowD/QKgT8njCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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