Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88d49e8631a71b1054f2cab2edc39f822d295db1d3138652cb982ae735ca89d1' 
  AND token = 'XZz5TYxBQwdx7TmXQ1rxBIXIHRrmJVn1wUGUm2DGf/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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