Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e2e35c3df09c51cfa809e3e039c2f108fa4e8048a5b630ddce5c6c82743743b' 
  AND token = 'Yf3SNWUqXtabpgSf89jakKOPuLC/SYw/KoVUYEpgMbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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