Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8184e88160d7460fa0f7e2210cfb98c641f8e7dec44754037da0af6bdcf4d22' 
  AND token = 'Jq6TawqicI4cRNQ/FZl5mneeV/1nbs9rdI8yJUkhH64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}