Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35c7772be5aca94d14c401a31bdada9508527774145d807dacfacec4510e5644' 
  AND token = 'TBf55vCI3/XEs7I4EdZM7x9MUmXz7Zgeb77awVqQ2kA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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