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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d6c23e0ee9cae91a33d629bf639dfc4ec0e5533fce81c6e7b6c9d2c8acb1fff' 
  AND token = '8Geyn1PgjR7/4AEIWHsnUpzjNdBVJwjqQulmbGWC/9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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