Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7405ed6789d3b649d5258e00cfe9a8c52c08621e4fce4522237cd9a0e112d9aa' 
  AND token = 'c14LbhddyaQiqFOTpo0Mql54pW4nndBxva9K3eoXllc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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