Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4cbdbd57aefde9b42d1a30bcdb761d2626271ec9b3395948170a3218759d902' 
  AND token = 'T5z0QW5dpnoME/LfcYV2+3urmi79OGl7nRpJXMikzYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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