Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '445ca75415ab896aaa0a62d4e993a502c0a48446138d82b1b6625a459ca45896' 
  AND token = 'EdWLOzSTL8bTUnH3R/mMOFWCbmv8zupYlNA+fe08HrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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