Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6979216da76b3050cb643e3f39eff863e2fe1b601f75efcbf02acc4a0a30bf53' 
  AND token = 'OiI5WxA6QwcpYPYIznGsp+5WDOr7fRF85pGx1flsSn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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