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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bee67e83bee7a93d0aef736d89b063e7211d5e93691917e8657071ad9ae22f6e' 
  AND token = '2XKY4foJ5ERVU54pkE8Ft/+Sa8FA6tm+V4ZekMtK+v0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}