Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b87419b57d9039663d3b8737698181346e49d0023fd051b602465c0e4ad99656' 
  AND token = 'mFcaW73UlPi4wUxpy4yj1PEoDhJJYlR1Or+bCAJco5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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