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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e408bf4b2df6f39223aa05dab74f6f5d3ce8851160e7d4636af2cd41bc9b45c' 
  AND token = 'vlZZ3YpxHV0STRKsNuQtFhg4ecIb5TFa9bjYKuAX948=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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