Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd69d6a96ccd94b7d88affc81599403ea6d30e72e46e15c41f3bc43da42ee8c48' 
  AND token = 'hfDFtgjfJu4zwkftYBcSJhhVxTRtgiGh4IowAb5mnWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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