Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdbba9a3345baab64291f766ddf9f577955c61f1b31f9c591f00675db8eb0d54' 
  AND token = 'UAk9XoyBud3p+KbvVmo1bRIge9p+4/BthMNlrrm4wHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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