Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7056a4325fc824df96e49ac1518407a0dfa66d5f4bdcb6988223bcc6b12cb844' 
  AND token = 'gk9Yu6Px0/xcoo95tBB/tUD6KEq+eHAtAvCr+17hnpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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