Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cec9ef99cae503c37572f760b80e4d168752b7987a2c6ecbf93b1c49e620a4d9' 
  AND token = 'BR1QwOZyJWNeU55WbTx2G1frUok+89Ekq71kCglGIMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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