Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b8b32a13346a69c3b8ed01533697a6a0bddfcf284e9440d2e478a79a523a408' 
  AND token = 'WNVvEqbyUNLwNyiBR7q+yf40zrFDgDbAH3o3ESm933A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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