SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d2d65a97c3f2eed35be80a02262af2e666a8976f108787edbad89235536da47' 
  AND token = 'OwAT3iY4T+2zGNzU/E77A5Omf0mKsqlgCX1nFwZOxXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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