SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f27129fe470de821d0682b651578de4e4724e8c29502553f31544dbadfcb9069' 
  AND token = 'hEK6iMhAxOzPvmSfLGaa2+sxYjOG8jTN/ClDsj3dn/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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