Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f515683934d02d4d14cdbbf1a59489faf21203f049ada3d2fac11c400ad03110' 
  AND token = 'gKvyQ6E50E2HbXbyH87rV2iDQ3if2jVqZxwqwm+WcDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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