Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab5b5f611e7e09a8b5632e19ddc20015493ba9c4606a5adfb52ea685ef2089fa' 
  AND token = 'O0o1h36nujWs+BPFeBfoM8MmDsU9D8g9my68JWXT4lo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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