Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd9bb3cf92dd1cb164d2ae5808503421d6c21ae423421d24179b58831b040640' 
  AND token = 'nJlrgMppTXgi/YJH/lay4MsnuFBBe7L38IoRG5qOulE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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