Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4155064cd2e379aea71b5663c261dc6e4464b6505984391d45ff716b15d6e95b' 
  AND token = 'e7M2y6LXhc8VzlxcbUtvM0XatPfU0N//LNsRuaU6C0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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