Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e893403a5efa3aab675bc1da90b309ebf156cc7658328fcb06dab309ea64796' 
  AND token = 'OQLgI7ZnlYZ8jsfvh0LfctvJ/M/ZZgcK20MYp2rHXEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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