Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c61b1371405a334ade5b9a0466e44197d2908498d123c9f8b0dcefe6f627303a' 
  AND token = '/3CpL7dWuTY7EePEv9IncB+R9aonc4IkTfvlOgQ49gQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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