Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f7eac3fa4df764e39e2b27ee7e10f48539500a6d31cb5604e1795dd212d07e2' 
  AND token = '6IQF4+womUgMO47t/zu+VO7icAPuF5Dsypj0KTHoPOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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