Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09f6711fc25e70cc670324549798770c8d04a2a38c71707b7fb467b125beddee' 
  AND token = '8qX99LDVgqT0WyHboHwa1htGafWtSGd9ejovbOvbH2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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