Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7fea93e0422f890b17d8dacc42ed25de62d3e2434affba9f5362b5b2f1a9d4e' 
  AND token = 'JBxm6ErLVIqbqjJ8RnFn+eI3L0J+7ajQvtaZkDs5s+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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