Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2986df2ce6871ef17b60a0887296e7c88f83694ef1005689181b1915638d871' 
  AND token = 'oV/Zj8wP5AEuHD+zNhvfWGA0PRn2QpED70LQDAfPBkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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