Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0d7f0006561a66aceca94668055ce05682b02796f9c5ed00a032d9c394e0d49' 
  AND token = 'mAzlX3rge04H9Pq1HlmCKLyzv0ELiST1GhHfzPt18/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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