Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54cc5122c9ff85d90bfa90dfeaa51a55e99642ec1b871c44d987d8002043c649' 
  AND token = '5mPPtc8QmqbBK61kVoP+XedMle6gzqpAkg/GhoKOUdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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