Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5da88609f59dc143b21a27b480971d1feee4d818b8d0e6e1782817eb2bba5220' 
  AND token = '0DdYgYNTPo+bcAHNu2itEtGfTYLsfS0lnXuUGbpZMWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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