Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec680c10e63282601d4e30ca612bb4ce83973130a2dc9592b3a99a447fa44036' 
  AND token = '9RTOhOE127cD0YwGbuC5iCdb5xZAEchAEna9WIh5yGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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