Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2048dd4c8e69cfb36f0b8bf74d05d5d983343328c1115ac100a68993e71dfe35' 
  AND token = '47PIAHy+RB006tSMG0zgpQL1TITSI9uWxrGrguZy+u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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