Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dae56a1e47fc72725fc67a90cd7ef3d60340d41fcbd1098a1c5ffdc0897d2470' 
  AND token = 'yWhhZx36bjP3sGUtWlAvM7EmBw3Bx10M4ikStBUzH+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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