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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0602069acb787aea296cbe85e7d8134ec35b9e92312da8b8b37aa5fb0234e40e' 
  AND token = 'TaHfDdp5QN0VCStOXQKXWM4KJ/065cOLOX8/qz2xb1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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