Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b9994bf9153524638ab09d237feefe95898e45b4dbedfb292d59e96141300ede' 
  AND token = 'd4SHa6Si0bMiNLCZKLUy9zbbUnXaIQKzspIm3vlbfgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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