Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '943af7af7da3174aa4ec76bdda82b12bb37d850c6f029e490c532e8ec7d7d58a' 
  AND token = 'xVBOCFwDCx4iAkmawR8pY9fQ9+VmEieMO50h2elyxv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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