Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c83e73ec086e8b11879d3c5bc4fe4e33bb711e49b59bf74202f97c58f37b1dfc' 
  AND token = 'ekAlL7wCsoQBmB4n7bZH/T5oNJj+ZACQd7vyyE40PnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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