Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c3cab46fa1ce805e3b7a9bf857fac0dcbe3e2cb9b042233fcb8de58ccfeca54' 
  AND token = 'F7HfD2NnK8C/qisx3otIhGLjzllY93ix/MUMpqJJ43k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}