Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcd8f5037dfe145c4ab4a5f739adbce1d83ff6e42c193f7eddae3401020a1211' 
  AND token = 'lWyBfAhlCyOJe9k10MieouMtzoQNt3wuAKk9hBdqqTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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