Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9179f6fa51ada0d5be37b73c0cf0b95a0a2a5c69e77028f81ff776ec022b5679' 
  AND token = 'PLhP3Wanf1Xvhx8Xl2sHcwPKPtoyZ4hsT7vk7z4q/QE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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