Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '440d8d7d68feb2016dba43d92e164b0b98ccd3e768fb355f990d652d827cddf5' 
  AND token = 'SsjmlRvvUAkFOKGWMVe9u6l/v1Td9BlVnJxEMF4LMZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}