Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '794a11b1b740eb37dcdbf66d757611cd99c9f2458d5e9a91abdbb64e4efa3704' 
  AND token = '9OOETT/1UbggTo0q/gA3UZKPD2JSx2/15KuBh0buBmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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