Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb183a64b751d31c9cb004ee2c48898af98528495efb1448c5c8179a8dc00165' 
  AND token = '6+TxYkzaGZam60ceEuFiEYWZmvkJ6hC42F4F84cKVEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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