SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b9ab8a18fb7f0ad8083769454c89f94b7253de06069fe8dcae613419f02130b' 
  AND token = 'qIz3AZ62m/EOLJOLzF9rRZP2gJmPczi6hGVkK7hfulY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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