Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dc2b519eca8b2c468e4e61518fc52c09aa19c8e8bab69ef64f96a0d1939f10d' 
  AND token = 'apYFtaNf+6Tay8s/FNthUCnGgcQb6ijWXgg8Ojk2WZs=' 
  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"
    }
  }
}