Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e7843532428b1171b9d7deb549e75a46702d6f9fe71572bab8357aff58cb25f' 
  AND token = 'dncAGZfQpu78fPT9VscKS66quCnVeKO5VAI7QBz6wcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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