Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbe07e520cd4d5cde1c1045b884c9a399cedd1d27b37f75af6a519b029579d88' 
  AND token = 'dkXowTim4d/sX/UO4sXJYooUeE9moz85f4adNNomqyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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