Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b73b031a229c998c2e5ae01fcbee8361df6a1c308c830b4d099b78450335d5f7' 
  AND token = 'gfUtC4HQd417yvh8UaTTnHLe3sGyDB+w4IrMHdIvHO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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