Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1b301ddcdfd99b59fa17f22e324cca05c90f20f2faaf252fea2e06e2608556d' 
  AND token = 'BFT12TMml/ICebKAhTHLu8tuQ4aEigEuuhVDnQy6yvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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