Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c19fba1c2a53057f43677d2364f282273da0c6b37aaad2ed7f5b27d8b9c4d3c' 
  AND token = '4P7UOFptXCUW9NlUG/NszbRWA4JyEfjFUw2P11SIDLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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