Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd38cda964f7683d415564634b7585e6ee74747232e75585c37f895b991a909b6' 
  AND token = 'cQKTB0dGEn6Wk5j1JX67MH9S2FFxjGE2/L2uvbbKksQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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