Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fa4f33c2e75b08efd7d45d0c1072f947a6356ee369704badf08ba73d58eb012' 
  AND token = 'vShA1EiynmS8ufwEWqX1grU0j9J4Gvn59m5QMU8knAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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