Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d7c74d203daaec601871670d5f7e9ef5c812a8fc5980bfc0057f07b1e9f66aa' 
  AND token = 'niJb2e/A0ZVMkAA3mNSqpF86kuvShK3zH5CZQHiKXRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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