Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db6c9e06599cd911a9cd459894438c58e5f31dae8c29a64af8a9f89b4e8e5dda' 
  AND token = '061/tiJ/WoD1oRZZ1qFZa5qEQYajmOycF8sb46c6NXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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