SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1151a6f04cfbed33591af94a50e1f6675085185ad3812798991e8f04072c21d5' 
  AND token = 'HUZipwnDNYMy+EKtQJWBwMCY4H/nHuAXqmuxsEt7rxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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