Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82bd4b8aa5ff36704828b235faf7dac8b4fd39e996330e612e024f26db156688' 
  AND token = 'HlE9hCy0ktMuETJPqabLEmEQJrYIAq+6BIdDGR+7ymY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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