Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3239ecb5c30d0a72f1aab6994e949f2fad2fd056d3d0163fae5176e43dc50cda' 
  AND token = 'btrW6B58YWySBS8nJRnJAf6QajZPBDTgJXn/BmWLZXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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