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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2563fc94013d220b2126a0c98787b86ea0f94bf002eab06efe2bbb684c93e428' 
  AND token = 'mb8uFTTjAw3ZRZ2qncF5cEqv2pzoCVa7uQp+tspFvVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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