Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a0dcf1a7e602b5d5d8efadb0ec95450a1f2b3c0220cf2eaa655fc95225059ac' 
  AND token = '6hZcjQv0vrkWuBmL6DA+BBxtWk7hNDZ4469TUpvcqD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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