Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eae08d249a8e77f0e133e8f36d1d5185e3f0693095857229d77a69d2f8431ac' 
  AND token = 'y961EraAnXv3X4r7ms203Er3WC3jHqIahwt4hDewvNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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