Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7ef383ba9fdc9c0f3a1694a829fd94bc168e71d71193e20c6221e14e8396e46' 
  AND token = 'Jk/DaH1Ua50YK29S/6AK6lfrfn1PQ5gVImdKsYjr/60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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