Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f658da4fb967992a027bf4485a8f00b719bf1a7cac62ec1b54d82e1ae6f8fb4' 
  AND token = '3lqV2VSJ7NAHlnwyeRSxMTnx0IrbPck0i5RSuATI/aU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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