Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74771360974950a2c200940c27444affd2ecd89dca499011c90f8115b6702dff' 
  AND token = '3HMh03MTfUSlqzsgX67tKxFui7CBEDfZIQVJCDvT/aQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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