Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa6261ddae2ec355c585864672981b0c29e42b6b834f344bac5a0a7188d2ad7c' 
  AND token = '0MMInyOR2Et1lyfVZwf+W/MrJJa9pO1RnTeM8lIy2Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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