SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95088e0dd32876f512beb4063e064baa9d3bd4f002a27c053510c15faf1ff499' 
  AND token = 'WAPecfQGxJ/a6zLkYUBKnxi/xJ/YSbJM7EUhllCQXgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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