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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9b45ce9ca839cde00c7993f7c92bce421068dae6717790ddf868b897d4cc7be' 
  AND token = 'CuVgpqib9Mm57Damtzpjo+iRH8S3esbdlXOX5YCUjps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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