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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63ec82691ec854ec1f6477f40bf56be9599ced21096cd9868a5e11033b1eaf22' 
  AND token = 'f9NGMbn4M0hMagaWqdSID3LZN/a1WyTho40NVKg7DsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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