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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5bdb44bfa13dba9abd0ca29dd881f938d5ce177347ddeb8c318ba5c81f909507' 
  AND token = 'ciUNfNC8p/vHuAgHK1Z86E9zHtfRc/4EwK322tnqrSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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