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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22f37c8508246caf5a33abc444a0d57a5f858a9b5528dc6fc61393d76d216919' 
  AND token = 'Ax5E90EFRPd79PVabn7ykDE1HC9dUAP6qsCxeNEj/+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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