Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27362962528367fc548dc0b2fb8483050ebeaabbf60b50b274ddf05820fc9138' 
  AND token = 'Hl8X3+wapwg4kxnXunhTZT1DCT3orgUnoLcr/D0JrlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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