Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f8c5c595b863c5816cd415c14cf4cb4110cc33a8f10c5378ad5acd4a3efc699' 
  AND token = 'Zr27t8x0MN5FmDoSsVTZ4inlDwRM4nrIZ1/ntl2xJfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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