Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52091e0d27447f276e9cafc8b574d4f75ba0617d7721d419c90fd24fb64b13b1' 
  AND token = 'uX1UI/C5E/O+Y0RCymgrU1HJuOJCKGtSA9gXrPhTkEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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