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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'adeee33f68b27949e001a96d0ee6d22773152500ed94ae3c3f509347f02d57ff' 
  AND token = 'jiKkYq1WAJyk8N4djkWPq7BQIOtBYO15IxZzHwHLsoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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