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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d2bcf30519e9d593e66586cc26a514c2ae893f0ee0404e98079f82d48f73ab9' 
  AND token = 'viPsbLFUtg7RZ01cy2iQdjCm82c1RdIGbw+rX7HWQzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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