Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7018b2559c7bada156993d8547e133f83dfb0bad7abe947faa7bb1d4d0875c09' 
  AND token = '+x1tu2Nk5IC8xVFgWbL4uWOjJKcQdke6ZiDP3Jw066Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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