Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd4d6e2f17e6a3cd5ba83449095b89a792c5eecb4972ef071d63ebb336db7fa8' 
  AND token = 'KZODIFw58m5ifu5ACre+zsOM/xHipgNxQ4DhboshNpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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