Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0cdfa3dd075f8177d29489edf7cb733874f7523cd8882777ed61e8fdb758cf5' 
  AND token = 'fO6yA3iMKjoCuynHpFh4SxAy8nKC63CJ4IDvQvGaXYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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