Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27add3f49e2424cd68a28e28964bad98a991c35414bab957c14350e30dd95972' 
  AND token = 'djnewoL1GI4ozQ/+FY/4yFg4Vf+eyGsQJQNk1//E02I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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