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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee96096d5e4ab7c0918024933f9e583ca5f9553e03add01189963b66fb50d69' 
  AND token = '4XNzADu7fH/okx7c6L8ycjSsXCwKy9OYy0Ays+jn9v4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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