Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f698d5b02d8af74765082bee9db771970cee11a3db8dec53518e1e68d8dcc5b' 
  AND token = 'A2KEQSCbbcyR1dZZihooLD5u0AMLvvlHLHU1XrdZqAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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