SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea69bea11d7934ac718a55e29bba5981428cede751186d45ee6c034f46fa5cdb' 
  AND token = 'Tq+YuCU6NCwwaBUpUF1vrRDpK7qhciV1n2j3ijZzFrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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