Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b8d67a2d781835d3d04e0be9bdf408acbcba627d885791712445eeaa11fcba6' 
  AND token = 'w26265AoHMMdPrpwBm0TzMF7WuabYQYDXWRFdAxgOGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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