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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29595d89fcfcbc04b7b3652700fef067f17247f46ecb79c12ab0e5fcea055c90' 
  AND token = '1qVQz38KXnnpfs6f5ipp78mbheSLfd2z7B7EiOs174g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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