Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e65e8715fa8f3618ccafd9f57e7cb862afa12839daa00d736d7fd10e1c89920' 
  AND token = 'aefxxXpS2OzCAj7UjZINwZOufmHbPIjFNpDmrbHe+jY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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