Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '09b66fabef786ca16dcfa783ebbd78196a1a4871a74e38f0d3a9b2f03f9763e6' 
  AND token = '+zprfEw0wzHozke08xYV70IqnTFk6v5O2r69i4BZ404=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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