Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'addb874ed9cd2320341447e144d72678ac7777bb20ea5a0e2c0510d8159b9928' 
  AND token = 'UgsB1bfMtASgKPh+ov4YkvKb4hfPM0zgqewbu41K9Ls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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