Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e858586c2b85f49776efce13bb1b99aeb0cdb42d93fdc839a32861169566b4a' 
  AND token = '8eVVpyINgcR/qsLJQ72GTqcK99HNwL/wW7GSOwS6kj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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