Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ac600f490b04c189cb2b16b791c51f158af0fd7f56c453ef616d507ad2a556b' 
  AND token = 'URrYQ3eh+8oflOxf9IG/ZQ+5L0ySMKdMv1GD/kB2upU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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