SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74c63c45da6a1a8db49467471932b8c91d03e5dfc55070b1ffb15c46323f0005' 
  AND token = 'SBMP5Zqvk/e0jhxqLXjLNBiLzzxL2Yqlq5avlDmutsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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