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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60818c42365e78ee60f41357ae1dc82f97543e838e2aeee3b5016dfee8b79139' 
  AND token = 'lNp0h5uyxQ/7J9JHCwAqLJh9VennR5n4hFGObYfdvCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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