Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9feb2bdea48a0d8bd13e23af5a25b20e3da7c15b5a5342fd8e3fc3a8dd632a4b' 
  AND token = '1oXku0YdUi/zxpofWCu0RbIU9ey4M2g1kmgpCA2fhLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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