Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b49d42202087b8bf2df9064cece8fa1ddac3161fbad1ad107410737368f1c4bd' 
  AND token = 'L0tLjW8e3JdvI6dlHEI/RH/gII0FkrY9JEn9037zEHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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