Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e19d89b759d3b6046bd98b990b245d9b51d375d1ed1385569ec78bf54c05d98a' 
  AND token = 'gedHF6c1WIZx8a8+YwmA/m8z/zncYJejyxBxWJjoJpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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