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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56f6814ea4f4c9e004d637bbf4b327a91eeb17b0a177f96f5e683cd6804164fc' 
  AND token = 'gaxre3ALlu8qzqwINyjYy9Y53bKlVGtdoYbHg5NFBS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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