Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c28e7644e60448f411ffb0c9f21faa1f9d5ae215edc0f739af7aabe06747906a' 
  AND token = 'slXYvefZzxl47RmMqsjlpKIjtKbL7LSPSz8xM0ZIITI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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