Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '446977c97f46b2d066c59afa0c05211f19d938a5dac5be3b44927ef8144d941a' 
  AND token = 'QXd3MVx6ii/5TAWFxedqdNCvaNKC+ivuXJtQI2xW36o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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