Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cd9e58fd7c1c0784a3fc3a2e96777d3a13df1c3c2ccd940f0eec219816d5151' 
  AND token = '4OtflX2+kn1MBp/FYdzECmsOwl5CClHmQN59fZZio/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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