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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b36603fae40ca55bba8de60b5f1fbecaa87b74c03343f58e8224b66532b7fad6' 
  AND token = '1EYCzW4/YDYHIZ4E8a0WSkIQv0t7FAOfx6i4f6D0hZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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