Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '669444654156dae545d76e614243e99135a4c95da2a4b90717f96fb02626e88b' 
  AND token = '2Xj7daI47AV1HYRkVslAqlupDDJSzUVBRC9iP9GNbAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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