Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a63627169c6360ead1fe0e6fe20ccf96587a65193bed81230c4a75ad7cd2d84a' 
  AND token = 'seC/UiUsg7DydVtsZC/M+gcrFdWkbJE24wVTgnHccBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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