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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'edb0e93b883088aafb822fa28dac98d14dd764601e4ecf4cb8adaade4cf15595' 
  AND token = 'TqneRVuDkFCk8oDzGWpmA4oPn2z56S50sRv+fvlWR5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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