Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee0cc440b0bfca6838f88d5cb207d1730ef67d42e09c4fa4be5cbfcc4e1dbb5' 
  AND token = 'j1PNX18BbM5Kve+OqkUFOpGJD+sYX95TM71ckCxMgQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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