Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb08fa72c07a49e8f565f72b5d7107f47af36178e98f1db3f50b06a77c753dd0' 
  AND token = 'pzmo5WearV1H1dH9rVnavR8v3Q1PmsJ+BMh/hyt6Gkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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