SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f60a717792a7d8bc1c29746ceb5b86624f4a3a4901354d4329d6309c9f7061a' 
  AND token = 'y1GFGH5fs81YNgYJehme/z3UfqCYaRTqHzBtiQf3sJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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