Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bee0b333f5a64bef193d5f5f8d8e34c14adf0e786878558491bab92f67abcf1d' 
  AND token = 'j8kfJ7zRzmzGPaMIyL6JMT0HF0zi8A96YUULDSrmlNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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