Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad6bb1515368402baaea62448b78dbe38a79ec87a167265be7c9e3152100b0da' 
  AND token = 'R4bfNQBRm5r84/4VRMvZasfKepg8maeFMSz9nqnkU9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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