Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f44ba476a6caacc190eae44361ea167189f3996c25eb12f443a0650e57623d9d' 
  AND token = 'RFwZDRi+74ln/b0anwjMJe38OqRo0uUJ9CqTmcMce2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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