SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd7e1aaa6d659c642419abc67a87ccaf3c64df05f449879c184ea583cf0badd23' 
  AND token = 'txMsJiTwqBOx56VmPpw8WFFXkWC7XsWtvaCQxOoqHLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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